stock android - Why doesn't BOINC use the CPU power fully on my Huawei P9 lite?

I installed BOINC on my Huawei P9 lite.

• model VNS-L31


• build VNS-L31C432B414


• Android 7.0 (stock)


• CPU Kirin 650


• RAM 3 GiB

I want the phone to run BOINC applications, when fully charged and connected to a wall outlet or PC. However it seems, that BOINC has no means to acquire all computing resources on that device. Antutu Benchmark shows no more than 68% CPU load and when inspecting the actual CPU load only four of the 8 cores are showing full CPU load the others exhibit half load and lower CPU clocking. Battery temperature doesn't exceed 29°C, which is fairly low. (I'm not living in Siberia)

Computing performance seems to be low, too, when compared to an old Samsung Galaxy S5 with lineageOS installed. I tried to find all settings concerning power usage and so on, but there are virtually none execept power saving mode and ultra power saving mode.

When I start the stress test of AnTuTu Benchmark, the battery temperature rises to 37°C, soon. All cores show nearly full load then.

Now what bugs me is:

• Is the CPU usage for background processes limited by some means?


• Is it possible that BOINC applications are so inefficiently programmed, that they can't acquire enough computing resources to create full CPU load?


• Can this be circumvented by rooting the phone and/or installing third party apps / non-stock ROM?

Don't get me wrong, I don't want to wear down my phone intentionally (in fact, on my old phones I don't give a s*** on that). But I want to have control over what I do on my devices.

Update

Did a test run with CPU-Z. It clearly shows, that the overall CPU-load is just 30% while Boinc running in the background. So the device must be throttled somehow.

** Update ** I added the thermal measurements from CPU-Z. [

It is rather obvious, that the temperatures can't be the cause for the throttled CPU. Anyone more clues why and how BOINC is kept from using the resources and how I can influence that behaviour?